Whats your craziest idea for a build ???

Whats the strangest ,oddest idea you ever had for a custom build or setup.Been thinking about a .577 t-rex built on a 50 bmg rifle would @ 30 lbs it would have 70 lbs of recoil with 12 ft lbs recoiling velocity.I think why not build it on a 50 bmg style rifle it only a 200-300 fps slower .Contacted bohica this morning(email) to see if they could make me a upper in .577 T-rex .And bluegrass armory about a viper .577.
The thing i like about Bluegrass armory i found out they live about 5 hrs away.Only bad thing about the 577 is the factory projectiles have a low bc of .292 and brass pricy but i fixed the brass thing.I contaced a Man who lathe turns odd caliber cases.he can make me a box of cases 20 for 70$ not bad when factory brass is 115$ for a wallet of 10.plus i like the lathe marks from machined parts lol .So whats your craziest project ?